Function read_v2_paths

Dependencies/tracy/libbacktrace/dwarf.cpp:2680–2807

   2, setting fields in HDR.  Return 1 on success, 0 on failure.  */

static int
read_v2_paths (struct backtrace_state *state, struct unit *u,
	       struct dwarf_buf *hdr_buf, struct line_header *hdr)
{
  const unsigned char *p;
  const unsigned char *pend;
  size_t i;

  /* Count the number of directory entries.  */
  hdr->dirs_count = 0;
  p = hdr_buf->buf;
  pend = p + hdr_buf->left;
  while (p < pend && *p != '\0')
    {
      p += strnlen((const char *) p, pend - p) + 1;
      ++hdr->dirs_count;
    }

  /* The index of the first entry in the list of directories is 1.  Index 0 is
     used for the current directory of the compilation.  To simplify index
     handling, we set entry 0 to the compilation unit directory.  */
  ++hdr->dirs_count;
  hdr->dirs = ((const char **)
	       backtrace_alloc (state,
				hdr->dirs_count * sizeof (const char *),
				hdr_buf->error_callback,
				hdr_buf->data));
  if (hdr->dirs == NULL)
    return 0;

  hdr->dirs[0] = u->comp_dir;
  i = 1;
  while (*hdr_buf->buf != '\0')
    {
      if (hdr_buf->reported_underflow)
	return 0;

      hdr->dirs[i] = read_string (hdr_buf);
      if (hdr->dirs[i] == NULL)
	return 0;
      ++i;
    }
  if (!advance (hdr_buf, 1))
    return 0;

  /* Count the number of file entries.  */
  hdr->filenames_count = 0;
  p = hdr_buf->buf;
  pend = p + hdr_buf->left;
  while (p < pend && *p != '\0')
    {
      p += strnlen ((const char *) p, pend - p) + 1;
      p += leb128_len (p);
      p += leb128_len (p);
      p += leb128_len (p);
      ++hdr->filenames_count;
    }